Segment Information (Details 2)	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2009
Revenue | U.S. | Minimum
Concentration Risk
Concentration of risk percentage	10.00%	10.00%	10.00%
Revenue | Major Customers
Concentration Risk
Concentration of risk, threshold percentage	10.00%	10.00%	10.00%
Assets: | Belgium | Minimum
Concentration Risk
Concentration of risk percentage			10.00%
Assets: | U.S. | Minimum
Concentration Risk
Concentration of risk percentage	10.00%	10.00%	10.00%
Assets: | Netherlands | Minimum
Concentration Risk
Concentration of risk percentage	10.00%
Property, plant and equipment
Concentration Risk
Concentration of risk, threshold percentage	10.00%
Property, plant and equipment | U.S. | Minimum
Concentration Risk
Concentration of risk percentage	10.00%	10.00%	10.00%